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Abstract
A new modified screen-printed electrode (SPE) based on a recently synthesized ligand 1,4-bis-(8-mercaptooctyloxy)-benzene (I), self-assembled to gold nanoparticles (GNP) as suitable carrier for Ce(III) ion determination with potentiometric method is described. The proposed potentiometric method was based on the fabrication of modified gold nanoparticles-screen-printed (GNPs-SPE) and modified screen-printed (MSPE) sensors. These potentiometric sensors respond to Ce(III) ions in the wide linear range of 3.25×10−10 to 1.0×10−1 and 1.0×10−7 to 1.0×10−2molL−1 with Nernstian slopes of 19.95±0.97 and 17.04±1.02mVdecade−1 for GNPs-SPE and MSPE, respectively. The detection limit of 3.25×10−10 and 9.5×10−8molL−1 was obtained at pH range 2.8–8.5 and 3.5–7.5 for GNPs-SPE and MSPE, respectively. It has a fast response with response time of about 4 and 7s, and can be used for at least 7 and 5 months without any considerable divergences in the potentials for GNPs-SPE and MSPE, respectively. Such abilities promote new opportunities for determining Ce(III) ions in a wide range of real samples. The results obtained compared well with those obtained using inductively coupled plasma atomic absorption spectrometry (ICP-AES).
Published Version
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